<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头像区域 -->
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 登录表单区域 -->
            <el-form :model="loginForm" :rules="loginFormRules" ref="loginFormRef" label-width="0px" class="login_form" >
                <!-- 用户名 -->
                <el-form-item prop="username">
                    <el-input prefix-icon="iconfont icon-yonghu" v-model="loginForm.username"></el-input>
                </el-form-item>
                <!-- 密码 -->
                 <el-form-item prop="password">
                    <el-input v-model="loginForm.password" prefix-icon="iconfont icon-mima" type="password"></el-input>
                </el-form-item>
                <!-- 按钮 -->
                 <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>
<script>

export default {
  data() {
    return {
    // 这是表单提交数据
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 这是表单校验规则
      loginFormRules: {
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    resetLoginForm() {
      //  重置按钮
      this.$refs.loginFormRef.resetFields()
    },
    login() {
      this.$refs.loginFormRef.validate(async vaild => {
        if (!vaild) return false
        const { data: res } = await this.$http.post('login', this.loginForm)
        console.log(res.meta.status)
        if (res.meta.status !== 200) return this.$message.error('登录失败')
        this.$message.success('登录成功')
        // console.log(res)
        // 1. 将登录成功之后的 token，保存到客户端的 sessionStorage 中
        //   1.1 项目中出了登录之外的其他API接口，必须在登录之后才能访问
        //   1.2 token 只应在当前网站打开期间生效，所以将 token 保存在 sessionStorage 中
        window.sessionStorage.setItem('token', res.data.token)
        // 2. 通过编程式导航跳转到后台主页，路由地址是 /home
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
    .login_container{
        height: 100%;
        background-color: #2b4b6b;
    }
    .login_box{
        width: 450px;
        height: 300px;
        background-color: #fff;
        border-radius: 2px;
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%,-50%);
        .avatar_box{
            width: 130px;
            height: 130px;
            border-radius: 50%;
            border:1px solid #eee;
            padding: 10px;
            position: absolute;
            left: 50%;
            transform: translate(-50%,-50%);
            box-shadow: 0 0 10px #eee;
            background-color: #fff;
            img{
                width: 100%;
                height: 100%;
                border-radius: 50%;
                background-color: #eee;
            }
        }
        .login_form{
            padding: 0 20px;
            box-sizing: border-box;
            position: absolute;
            bottom: 0;
            width: 100%;
            .btns{
                display: flex;
                justify-content: flex-end;
            }
        }
    }
</style>
